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| author |   Leon Romanovsky <leonro@nvidia.com> | 2021-06-29 09:49:33 +0300 |
|---|---|---|
| committer |   Jason Gunthorpe <jgg@nvidia.com> | 2021-06-29 19:57:18 -0300 |
| commit | 3d8287544223a3d2f37981c1f9ffd94d0b5e9ffc (patch) | |
| tree | 522fe43b4f90766560f9e7ec0cba147de84c46a3 /drivers/infiniband/core/cma.c | |
| parent | RDMA/mlx5: Don't access NULL-cleared mpi pointer (diff) | |
| download | linux-dev-3d8287544223a3d2f37981c1f9ffd94d0b5e9ffc.tar.xz linux-dev-3d8287544223a3d2f37981c1f9ffd94d0b5e9ffc.zip | |
RDMA/core: Always release restrack object
Change location of rdma_restrack_del() to fix the bug where
task_struct was acquired but not released, causing to resource leak.
ucma_create_id() {
ucma_alloc_ctx();
rdma_create_user_id() {
rdma_restrack_new();
rdma_restrack_set_name() {
rdma_restrack_attach_task.part.0(); <--- task_struct was gotten
}
}
ucma_destroy_private_ctx() {
ucma_put_ctx();
rdma_destroy_id() {
_destroy_id() <--- id_priv was freed
}
}
}
Fixes: 889d916b6f8a ("RDMA/core: Don't access cm_id after its destruction")
Link: https://lore.kernel.org/r/073ec27acb943ca8b6961663c47c5abe78a5c8cc.1624948948.git.leonro@nvidia.com
Reported-by: Pavel Skripkin <paskripkin@gmail.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'drivers/infiniband/core/cma.c')
| -rw-r--r-- | drivers/infiniband/core/cma.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c index 420de383c039..515a7e95a421 100644 --- a/drivers/infiniband/core/cma.c +++ b/drivers/infiniband/core/cma.c @@ -1837,6 +1837,7 @@ static void _destroy_id(struct rdma_id_private *id_priv, { cma_cancel_operation(id_priv, state); + rdma_restrack_del(&id_priv->res); if (id_priv->cma_dev) { if (rdma_cap_ib_cm(id_priv->id.device, 1)) { if (id_priv->cm_id.ib) @@ -1846,7 +1847,6 @@ static void _destroy_id(struct rdma_id_private *id_priv, iw_destroy_cm_id(id_priv->cm_id.iw); } cma_leave_mc_groups(id_priv); - rdma_restrack_del(&id_priv->res); cma_release_dev(id_priv); } |